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Added 1 day ago
J
Intermediate Process Mechanical Engineer (Water/Wastewater)
Jacobs
Ottawa, ON
- $75,000 to $90,000 USD / year
- Full-time
…career working with the industry’s best and most innovative engineering employers, then Jacobs is where you belong. We are looking for a driven and curious Process Mechanical Engineer to…
Added 1 day ago
S
Intermediate Process Mechanical Engineer- Water
Stantec
Edmonton, AB
- Full-time
We are currently looking for an Intermediate Process Mechanical Engineer, specializing in water and wastewater treatment to join our Water group in Edmonton or Red Deer. This team member…
Added 1 day ago
R
Intermediate Piping Engineer – Fire Protection
Raise
Burnaby, BC
- Full-time
The Generation Stations Mechanical Engineering Balance of Plant team has an exciting opportunity for an Intermediate Fire Protection Design Engineer based out of 's Edmonds office in…
Added 1 day ago
GS
Electrical Engineer/Designer
Grantek Systems Integration
Burlington, ON
- Full-time
The Electrical Engineer/Designer at Grantek is an exciting opportunity for an intermediate to senior-level professional with a strong background in electrical design and industrial control…
Added 1 day ago
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Electrical Engineer/Designer
Grantek
Burlington, ON
- Full-time
The Electrical Engineer/Designer at Grantek is an exciting opportunity for an intermediate to senior-level professional with a strong background in electrical design and industrial control…
Added 2 days ago
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Senior Process Engineer
Kent
Calgary, AB
- Full-time
Kent is looking for a Senior Process Engineer to join our engineering team. We are open to candidates based in Calgary or Edmonton, Alberta. The successful candidate will develop and review…
Added 2 days ago
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Senior Process Engineer
Kent
Calgary, AB
- Full-time
Kent is looking for a Senior Process Engineer to join our engineering team. We are open to candidates based in Calgary or Edmonton, Alberta. The successful candidate will develop and review…
Added 2 days ago
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Intermediate Process Engineer
Kent
Calgary, AB
- Full-time
Kent is looking for an Intermediate Process Engineer to join our engineering team. We are open to candidates based in Calgary, Alberta; Edmonton, Alberta; or Sarnia, Ontario. The successful…
Added 2 days ago
Intermediate Environmental Scientist
Vertex Resource Group
Calgary, AB
Vertex is currently accepting applications for a full-time, permanent Intermediate Environmental Scientist to join our team. In this role, you will manage and support a variety of oil and…
Added 2 days ago
Intermediate Environmental Scientist
Vertex Resource Group
Sherwood Park, AB
Vertex is currently accepting applications for a full-time, permanent Intermediate Environmental Scientist to join our team. In this role, you will manage and support a variety of oil and…
Added 3 days ago
KC
Intermediate Hydrotechnical Engineer - Water Dams
Klohn Crippen Berger
Vancouver, BC
- Full-time
KCB's growing Power and Transportation Group is seeking an Intermediate Hydrotechnical Engineer with experience in the design of hydraulic structures, hydrology, numerical flow modelling,…
Added 3 days ago
KC
Intermediate Hydrotechnical Engineer - Water Dams
Klohn Crippen Berger
Vancouver, BC
- Full-time
KCB's growing Power and Transportation Group is seeking an Intermediate Hydrotechnical Engineer with experience in the design of hydraulic structures, hydrology, numerical flow modelling,…
Added 4 days ago
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Intermediate Hydrogeologist
Equilibrium
Remote, Canada
- Full-time
- Remote
As an Intermediate Hydrogeologist, you’ll plan and deliver hydrogeological investigations, coordinate field programs, analyze and interpret groundwater data, and develop conceptual…
Added 4 days ago
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Intermediate Hydrogeologist
Equilibrium
Remote, Canada
- Full-time
- Remote
As an Intermediate Hydrogeologist, you’ll plan and deliver hydrogeological investigations, coordinate field programs, analyze and interpret groundwater data, and develop conceptual…
Added 4 days ago
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Senior Technical Consultant, Geotechnical Engineer - Dams
Worley
Markham, ON
- Full-time
Play an integral role in Worley Consulting’s Geoscience Practice, helping strengthen our geotechnical and dam engineering capabilities in Ontario while supporting complex mining, tailings…
Added 4 days ago
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Senior Technical Consultant, Geotechnical Engineer - Dams
Worley
Oakville, ON
- Full-time
Play an integral role in Worley Consulting’s Geoscience Practice, helping strengthen our geotechnical and dam engineering capabilities in Ontario while supporting complex mining, tailings…
Added 4 days ago
WI
Junior Process Engineer
WSP in Canada
Vancouver, BC
- Full-time
With an unmatched breadth and depth of engineering, advisory and science-based expertise, our global minds unite to power local solutions.
Added 4 days ago
WI
Junior Process Engineer
WSP in Canada
Vancouver, BC
- Full-time
With an unmatched breadth and depth of engineering, advisory and science-based expertise, our global minds unite to power local solutions.
Added 4 days ago
W
Senior Technical Consultant, Geotechnical Engineer
Worley
Markham, ON · Oakville, ON
- Full-time
Play an integral role in Worley Consulting’s Geoscience Practice, helping strengthen our geotechnical and dam engineering capabilities in Ontario while supporting complex mining, tailings…
Added 4 days ago
Junior Process Engineer
WSP
Vancouver, BC
With an unmatched breadth and depth of engineering, advisory and science-based expertise, our global minds unite to power local solutions.
Added 4 days ago
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Senior HVAC Engineer
AtkinsRéalis
Mississauga, ON
- Full-time
Registered Professional Engineer in a Province of Canada, qualified to seal mechanical and chemical engineering documents.
Added 4 days ago
MA
INTERMEDIATE CIVIL ENGINEER
MPE a division of Englobe
Lethbridge, AB
- Full-time
Bachelor’s degree from an accredited university in Civil or Environmental Engineering.
Added 5 days ago
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Bridge Design Engineer
EXP
Calgary, AB
- Full-time
Be our next Intermediate Bridge Design Engineer!
Added 5 days ago
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Civil Engineer - Design and Project Management, Urban Infrastructure, Greater Montreal Area
JobsMedia.io
Montreal, QC
- Full-time
Our client, a well-established consulting engineering firm recognized for the quality of its municipal infrastructure projects, is seeking an experienced civil engineer to join its team.…
Added 5 days ago
ME
E5: Mechanical Engineer
Morson Edge
Burnaby, BC
- $98 to $120 CAD / hour
- Contract
Exercise sound professional judgment and take responsibility for engineering work, including work performed by delegated personnel.

AtkinsRéalis

Senior HVAC Engineer

Mississauga, ON, Canada

Full-time

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Job details

Job type: Full-time
Apply by: Nov 30, 2026
Experience: A minimum of 15–20+ years of progressive experience in industrial plant, mechanical building services and infrastructure engineering.
Posting language: English
Posted: Oct 20, 2026

Original job description

Job Description

Overview

We are seeking a highly experienced Senior HVAC & Mechanical Lead Engineer (P.Eng.) to lead the mechanical design and multidisciplinary execution of complex infrastructure projects. In this role, you will oversee the complete lifecycle - from concept through contract administration - for HVAC for Nuclear Power Plants.

This position requires experienced individuals who are self-starters capable of working independently and leading/supervising junior engineers. The individuals will work in a fast-paced team environment performing engineering services for Nuclear Power Plants within a matrix organization.

Your role

Lead detailed design for HVAC and cooling systems. Supervise, train, and mentor junior and intermediate engineers, technologists.
Perform complex heat load calculations, equipment sizing (including high-capacity chillers, boilers, and pumps), piping /duct sizing, and hydraulic modeling, fluid flow analysis and pressure drop calculations.
Perform conceptual and detail design activities for HVAC and supporting systems which include preparation of ducting and instrumentation diagrams, detail drawings and equipment arrangement/layouts.
Support design registration submissions related to power plants (both conventional and/or nuclear), other commercial, etc.
HVAC equipment sizing and selection (AHU, FCUs, Stack etc.), prepares technical specifications, datasheets, engineering quotation request, technical tender evaluation and vendor document review.
Review design calculations, analysis reports, documents, and drawings in support of design verification.
Design specialized environmental systems for Class 1 Zone 1 & 2 hazardous locations.
Ensure full adherence to local, provincial, and national codes and standards including OBC, NFC, NFPA (including NFPA 820), ASHRAE, TEMA, API, and AODA. ASME (B31.1/B31.3, Section VIII) is an asset.
Interface directly with regulatory bodies (TSSA, MOE, Enbridge).
Define mechanical work scope, performing cost estimates, support proposal preparation, monitoring and reporting project progress and communicating with clients.
Collaborate with architectural, structural, electrical, and process control disciplines to integrate mechanical designs smoothly. Conduct technical, conceptual and detailed design meetings with peers, clients, and suppliers. Conduct site visits at site and suppliers.
Vendor development, technical evaluation for purchasing equipment, engineering estimates, budgets, schedules, and deliverables in accordance with Quality Management Systems.
Assist with proposal preparation, technical writing, and fee estimates to win competitive bids, respond to RFIs and evaluate vendor proposals. Prepare and review engineering quotation requests and technical evaluations. Review and approve supplier’s capability to fabricate the required component within the applicable requirements.
Review field change notices, shop drawings, conduct site inspections, and resolve design deviations, and oversee deficiency resolutions and commissioning support.
Provide engineering support to quality surveillance, manufacturing, assembly and testing with non-conformances. Evaluate the completeness and status of delivered equipment.

About you

Engineering degree from an accredited University in Mechanical Engineering, Chemical Engineering or Engineering Science.
Registered Professional Engineer in a Province of Canada, qualified to seal mechanical and chemical engineering documents.
A minimum of 15–20+ years of progressive experience in industrial plant, mechanical building services and infrastructure engineering. Strong knowledge of closed loop cooling water supply and chilled water supply systems is essential.
Experience for Nuclear Power plant will be an asset. Solid understanding of process systems, P&IDs, material selection and fundamentals of equipment design. Solid understanding and experience with equipment sizing, selection, and troubleshooting issues.
Experience working in or performing design work for systems within a nuclear facility licensed in Canada or outside Canada.
Working knowledge of/experience with the CSA B51 standard, ANSI B31.1, ASME B31.3 codes, and other power plants applicable standards or regulatory guides.
This is a leadership role; the successful candidate is expected to have demonstrable experience leading a team of technical professionals.
Strong written and oral communication skills are essential.
Willing to travel to and potentially work full or part-time at Project sites to meet corporate needs (Note: the initial site location is at the Mississauga head office in Ontario).

Additional, preferred qualifications:

Experience performing work according to nuclear power plants procedures, practices with the appropriate qualifications for nuclear power plants engineering activities is an asset.
Familiarity with HAP for load sizing and energy modelling. Familiarity with AFT Fathom (water flow/pipe sizing), AFT Arrow (duct sizing/pressure drop).
Knowledge of/experience using nuclear pressure boundary Codes and Standards, including CSA N285.0 and ASME Section III for reactor systems, code classification, code class boundary, and design registration is an asset.
Knowledge of seismic and environmental qualification methods and processes is an asset.
Presentation skills and public speaking abilities are an asset.

Rewards & benefits

Explore the rewards and benefits that help you thrive – at every stage of your life and your career at AtkinsRéalis in Canada.

Enjoy competitive compensation, employee recognition, and a brilliant range of flexible benefits you can tailor to your health, wellbeing, financial and lifestyle needs.

Make the most of diverse opportunities for training and professional development to grow your skills and expertise.

And take advantage of our hybrid working culture and generous time-off policies to balance a fulfilling career with your personal life.

Be rewarded. Find out more.

About AtkinsRéalis

We're AtkinsRéalis, a world-class engineering services and nuclear organization. We connect people, data and technology to transform the world's infrastructure and energy systems. Together, with our industry partners and clients, and our global team of consultants, designers, engineers and project managers, we can change the world. We're committed to leading our clients across our various end markets to engineer a better future for our planet and its people.

Find out more.

Additional information

AtkinsRéalis cares about your privacy. AtkinsRéalis and other subsidiary or affiliated companies of AtkinsRéalis (referred to throughout as “AtkinsRéalis”) are committed to protecting your privacy. Please consult our Privacy Notice on our Careers site to know more about how we collect, use, and transfer your Personal Data.

By submitting your personal information to AtkinsRéalis, you confirm that you have read and accept our Privacy Notice.

Appropriate accommodation will be provided upon request throughout the recruitment and hiring process as required by Company policy and the Accessibility for Ontarians with Disabilities Act (AODA).

Successful applicants will be notified about AtkinsRéalis’ accommodation policies at the time the employment offer is extended, and the information will be shared with new personnel during the onboarding process.

Worker Type

Employee

Job Type

Regular

At AtkinsRéalis, we seek to hire individuals with diverse characteristics, backgrounds and perspectives. We strongly believe that world-class talent makes no distinctions based on gender, ethnic or national origin, sexual identity and orientation, age, religion or disability, but enriches itself through these differences.

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More about this job

Responsibilities

Lead the mechanical design and multidisciplinary execution of complex HVAC and cooling systems for nuclear power plants. Supervise and mentor junior engineers while managing project lifecycles from concept through contract administration.

Requirements

Requires a degree in Mechanical or Chemical Engineering and registration as a Professional Engineer (P.Eng.) in Canada. Candidates must have 15-20+ years of progressive experience in industrial or infrastructure engineering with strong knowledge of cooling systems.

Skills

HVAC design
Mechanical engineering
Nuclear power plant systems
Equipment sizing
Heat load calculations
Piping and duct sizing
Hydraulic modeling
Fluid flow analysis
Technical specifications
Vendor management
Project management
Regulatory compliance
Team leadership
Mentoring
Quality management systems
Technical writing

Benefits

Competitive compensation
Employee recognition
Flexible benefits
Training and professional development
Hybrid working culture
Generous time-off policies

Visa sponsorship

Not detected in the job text

Keywords

HVAC
Mechanical Engineering
Nuclear Power
P.Eng.
Chillers
Boilers
Piping
Ducting
Hydraulic Modeling
Fluid Flow
AHU
FCU
OBC
NFC
NFPA
ASHRAE
TEMA
API
AODA
ASME
TSSA
MOE
CSA B51
ANSI B31.1
HAP
AFT Fathom
AFT Arrow
CSA N285.0
Seismic Qualification
Quality Management

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